Power device.



No. 820,701. PATENTED MAY 15, 1906.

' 4 0. J. COLEMAN. POWER DEVICE.

APPLICATION FILED JULY 11, 1903.

fig. 2

Wz'irzsses: y In ver z io sure of the pi" Be it known that i, 'CLLDL citizchof t'i'ie Ui'iited States sway; i the com:

. iul impri' which the toliowii eucc being had thev {ll'iiWi'i'lgi-L M iuveniion relates to fluid tivc power e jpsretus comp pro limler or pressure together with :1 piston or pert cooperative with such cliemliier, end in which motive-pmver spperstus it is i'iecessery or desirable both to proide I ee relative mewement of the piston and cylinder and l drainage from the cylindcr or pressure fluid chember and also to n'm-iritsin sl juncture between the 1 sure-fluid chmuber and its cooperating chemher scrdiug port in order to prevent waste" leakage of pressure fluid from such 'nber While the parts are held in their relative pcsiticns into c 'ch they are moved by pres i /iy invention has one or. Y tageous application in its A Wzty epphzuioes, such as railway troliiugapparatus and systems, .v railway signaling apparatus sud raiiwziy switch-operatic apparatus and like i tus and systems which are requii 3 etc reliably and positively and i personal attendance and. often.v s at long intervals, during which loug'interysls the up pumtus may be subjected to s .ther

conditions, such as intense cola incur liability to freezing of consv tu e in the pressure-fluid chenber z qucnt seeking or jun-lining of the mm portions of he apparatus, so as to their operation when they are more.

To the stte'iuu'ieut oi the iorc oiug my invention comprises en in a e ed, fluid chamber or cylinder Whifi iormciiy open at its lower end, so {1S 0 permit "reiuege of moisture which tends to soc-unite iut'e' in the cylinder by condeiiszttiou upoi wells.- Fluiabpmssure mot-iv, cwerd H which are operated by cos other eonroressed gas are pecuiie this troul'ue, since thmoisture its F I we assess, ASSlGNOR :eossrrou or Mim THE Eatented May 15, 1906.

i. will now describe the accompanying drawings, showing devices embodying my involition, and will thereafter point out my invention in claims.

Figure 1 is a side elevation of my device in. partial section. Fi s. 2 and 3 are views, partially in section, 0' the operatingcylinder, iiiustmting two methods 0 .lermetlcally seeiing the seine.

My device is shown in a form adapted for he ectue-tion of milwayeignels, Upon c uizt er 2, upon which recipr'ocetes a movable cyl- 'rider 3. The cylinder is provided with an arms, which may be secured to the upenddowri rod of it railWay-siguel semaphore or may be connected With any device to which construction and from thence st the desired reduced pressure by a pipe 8 into a chamber 3.13. The operative valve 9 comprises the fluid or gas inlet chamber 10 and a sup ly slid exhaust port 11 and is rovided witii a helix or coil 12 and a bar 13, caring the sunpiy yer-ire i and an exhaustwelve 15. The

i3 siso carries a cross-piece 16 in the nature of an armature. T 1e alyeis also provided with a pipe 17, which is designed to ex tend through the center of the fixed plunger Qinto the oylindcr'chamber and form a suppiy and exhaust fluid duct.

I have found in steudiug the necessity for providiu free drainage for the motive-power cylin er or chamber it is also necessary that the cylinder 03? chamber should be tightly sealed during ble standard 1 is rigidly attached a piunprsctice that notwith the time which it is required-to hold the setusuimbiy SWZL 30, and H 2 1 Plug S im I the lower or bevolwi mid of Hi0 sleeve of the pressure liuiii.

uid i'ioiii the (110111; A oi" time Noon ii 15 mos; mipcm 21 mod on ti red in ti adap (i Lo abur -1. ring 7 boss ring 31 lfifiPhili to? :C projo 'on 33, atuvlheii to or CHER tho powoomodinm duct. Th 14mm: the sleeve foiming tho piaton i a-iiiiiils zl soft -i(1i ififii" which not; i'iohili'aots by i own 1* M .Qf diameter considerably than the inner dianie'toi' of the oyiindar and which in tum abuts mmeivaiiiv ring that ahuis .tiiouidvr 28 and coinpiotcsiiie piston omi the. plum- The action oiltois device simiiar to that of the device (if-Fig. .3 in that the prossure of the power medium causes the sealing of the oil-(amber. in this instance the chairi be sealed by the iiilfilQ-iiiifthe soft packing due to compression i 35) the metallic ring 35, which is engaged by the iowoi -::yiindoi'-head and acts a s to limit the Upward movement of the cyiiiirior, which presses upward on the memilin and forces it. agaii'ist the soft puki My ovice, as shown in the'iimwings,

eieotri Jiy controlled. Tho power U'lQLiiUlfl, which maybe carbon dioxid, maybe f'uppiii-Ri from & sui abio stoi'ago lank containing tiiix fluid iii iiquid Form and will enter tho reduning-x aivo 7 through tho pipe'fi. 'fi'ioi'edui'zillg ii'ui 7 adjusted to titflfifisiicfii opoi'a' iii o pith-Miro, and the fluid at the LiGSiiELi, ro-

to prevent wasi'ei ui i0. J if dur u;

ringthe exhaust-port, and attached to a mm 13, .5 5 and A l niizimoii and cimmborn omfiand the (limo; Merit of" the parts an?! o.

chamber miiini: oei'zmi iiii) mom 1 .ago oi moisture n m such 01mm oer.

2. Fiili(i--'J1OSS{1T \E-POWCT app-2r '1" 2iprsrs iquid oi'mmbei' iiig part, ifho ohzmii'ioi' ling: part being movable. J each other by pressure of pros "i in the cimi'nber and the. ciiamber-sea-iii part not orig 'ing; the Waiis of the oiimifi but having: a drainage fi 'illfii'i ic, and a seei in sui'ia-co somzroi rciiiiivoiy to the oiiiiiiiimi in n :ition to be engage: $18.6ihl11ii3fl sealing part at the limit of its stroke so as to (J-iOHB the 11th of fluid oiiiux' through the siraii iaigo o om'iiiioo.

3. I. .iiid-pressu 17o motive-power apparatus comprising a pl't$F-lill'fi-iiui(i .onambor and a. oiiambu aiing part ooiiminoci tiiemwitiiiii, the o imiii'mi be s; movabie by pressure of pressure fluid within ii, and the chamberscares sealing part fitting the chamber loosely and with clearance between the chamber-sealing part and the chamber to permit. free movement of the parts and drainage of moisture from such chamber.

4:. Fluid-pressure motive-power apparatus comprising a pressure-fluid chamber and a chamber-sealing part, the chamber being movable by pressure of pressure fluid within it, and the septum not engaging the walls of the chamber but having a drainage clearance, and a sealing-surface secured relatively to the chamber in position to engage the chambersealing part at the limit of the stroke or the chamber so as to close the path of fluid efflux through the drainage clearance.

5. Fluid-pressure 1notive-power apparatus comprising a vertical pressure-fluid cylinder normally open. for drainage at its lower end, piston contained within the pressure-fiuid inder but not engaging the sides of the cylinder but having a drainage clearance to permit drainage of moisture from the cylinder through its lower end, the cylinder and piston being movable relatively to'each other by pressure of pressure fluid in the cylinder.

6. Fluid-pressure motive-power apparatus comprising a vertical pressure-fluid cylinder normally open for drainage at its lower end, a piston'contained within the cylinder with a drainage clearance between piston and" cyl inder to )erinitdraina e oiiinoisture from the cylin er throughsuc drainage clearance and through. the lower and normally open end of the cylinder, such cylinder and. piston being movable relativelv to each other by pressure of pressure fluid in the cylinder, and a cylinder-sealing surface fixed relative to the cylinder in position to engage the piston at the end of the relative movement of the parts in order to close the path of fluid efilux through the drainage clearance and lower end of the cylinder.

7. A power device comprising a piston and cylinder movable relatively to each other and means for introducing a v ower medium into the cylinder, the piston aving a shoulder,

and a flexible sealing-ring carried by the cyl inder and located so as to be pressed'against the shoulder of the piston by the power me-' dium at the end of the expansive stroke.

8; Fluid-pressure motive-power apparatus comprising a vertical pressure-fluid cylinder normally open for drainage at its lower end,

a piston contained within the pressure-fluid v cylinder but not engaging the sides of the cylinder but having a drainage clearance to permit drainage of moisture from the cylin, der through its lower end, the cylinder beingmovable b pressure of pressure fluid within it.

9. Fluid-pressure motive-power apparatus comprisinga vertical pressure-'iluid cylinder normally open for drainage at its lower end, a piston contained within the eylinderwith a drainage clearance between piston and cylinder to permit drainage of moisture from the cylinoer thrcu 11 such drainage clearance and through the lower and normally open end of the cylinder, such cylinder bein movable by pressure of pressure fluid wit n it, and a cylinder-sealing surface fined relative to the cylinder in position to engage the piston at the end of the-relative movement of the parts in order to close the path of-fiuid' efiiux through the drainage clearance and lower end of the cylinder.

10. A power device comprising a piston.

and cylinder movable relatively to each other, means for introducing a power medium into the cylinder, the piston having a conical shoulder thereon, and a flexible sealingring carried'by the cylinder and arranged to coact with the shoulder oft-he piston In testimony whereof I'have'afixed my signature in presence of twowitness'es. I

,cnrnn J. COLEMAN.

' Witnesses:

' HENRY "D. Wrrnmus,

JOHN F. SrroaLE-. 

